Some interesting places to visit in the USA that you haven't visited before:
Chicago, Illinois for sure
anywhere in Hawaii - Maui, Oahu, Kauai
Key West, Florida (about 150 miles away from Miami) - this is a tourist haven and contains the southernmost point of the continental U.S. - this city is closer to Havana, Cuba than it is to Miami
Las Vegas, Nevada
Denver, Colorado
Arizona for the Grand Canyon/Phoenix/Tucson